Furnace



April 9, 1929.

G. A. wue 1,708,289

FURNACE Filed Jan. 18, 1928 2 Sheets-Sheet GUSTAV A. WIm.

noei ltoz G. A. \NIIG April 9,1929.

FURNACE F iled Jan. 18.

1928 2 Sheets-Sheet GUSTAV A.W1m.

avwentoz Patented Apr. 9, 1929..

TUNITED STATES PATENT OFFICE.

GUSTAV A. wire, or onena nnnnesxe, ASSIGNOR T0 ROBERT MABMET, or OMAHA;

NEBRASKA, AND HIMSELF.

FURNACE.

Application filed January 18, 1928. Serial No. 247,558.

My invention relates especially to that class of tubular hot airfurnaces which are commonly used for heating dwellings and otherbuildings, and which individually comprise a combustion chamber, ahousing which surrounds the combustion chamber, and a pluralit o1"-tortuous, or roundabout, fines for heating air in the housing. It is themain and comprehensive object of the invention to increase the heatingefficiency of such a furnace by transferring to the within the housingasmuch as possible, or all, of the heat which is derived from the fuelconsumed; and to increase the heating power of the furnace withoutincreasing its size. To accomplish these objects I incorporate in myimproved furnace, as parts thereof-within the housing, a combustionchamber of special description, manifold united with that chamber, aplurality of fines tapping the manifold, and a radiator connected withthe fines.

In the accompanying drawings, illustrating the best manner in which Ihave contemplated applying the principles of the invention, Fig. 1 is afront elevation of a gasburning furnace which is constructed inaccordance with these principles. This elevation is partly in verticalsection on the section line 1-1 of Fig. 5. Figures 2, 3 and 4;

are deta ls. Fn; 2 a Verticalsection on the section line 2; of Fr 5.Fig. 3 is a e, SlClO elevation partly in vertical section on the sectionline 33 of Fig. 2. Fig. l is a vertical section on the section line 44or 1 Fig. 5 is a side ehwhen of the same .ce partly in vertical sectionon the secone o-o or T 1, and partly broken j t Y the contents of thecombustion drawings the housing of the furnace is denoted by thenumeral 1. It is a double-walled metallic shell, of general reci a orcubical form, having in its oppowalls and near the bottom thereof itsside walls a plurality of air outlet pipes It has also the front door 4for access to a combustion chamber, the front door 5 for the admissionof air to a burner, and the rear outlet pipe 6 for connection with achimney.

Between the vertical walls of this housing, and moderately spacedtherefrom, the combustion chamber 7, including; the burner 8 as well i sthe passageways 9 and 9 for air to the burner, is supported by thebrackets 10. This chamber is a hollow metallic shell having the generalexternal form of a polygonal prism and supported in horizontal positionin the chamber 11 within the housing. It has two duplicate upper wallsconverging symmetrically from its narrow sides 23 to the top line of thecombustion chamber like a ridge roof, and two duplicate under walls 21similarly converging to its horizontal bottom It is perforated from topto bottom by a plurality of tubular air passages 13, rectangular incross section, and has a lining of firebricks 1st for the protection ofthe sides 21 near the burner 8. To increase the radiating surface of thecombustion chamber and to promote the distribution of its gaseouscontents, its extreme right and left marginal portions adjacent to itsside walls 23, and to the air passages 13, contain severally a pluralityof alined horizontal narrow tubular conduits 19, which form part of thischamber. Thus the air chamber 11 and the combastion chamber 7 mutuallyinterpenetratc,

the one by its air passages 13 andthe other by its flues 15, etc; whileseparated parts of the combustion chamber are connected by the conduits19. The chamber 7 is further provided with the upstanding manifold 12,which is a hollow metallic shell, or dome, across the top of thecombustion chamber near one end thereof and intercommunicatingtherewith. From the upper part of this manifold proceed symmetricallythe separate lines 15 and 15, which are rectangular in cross section,and which individually com- A ascending )O1'liO11S thereof and leadcircuitously in the air chamber 11 to the radiator 16. This radiator isa metallic shell having; the general form of a short polygonal prismwhose sides are in the same planes rcs-zpectively as are those of thecombustion chamber. It has separated top inlets which are continuouswith the lines 15 and 15 respectively and a rear outlet 17 which iscontinuous with the chimney pipe (3. It also contains the bafile plates18 and 18, and is supported a short distance behind the com bustionchamber by the bracket 10. Operatively the hot gases of combustioncirculating in an air chamber which is of comparatively small size,pursue the long, retarded, confined, compacted and heat-dispensingcourse which is indicated in the drawings by the feathered arrows.

I claim as my inventio'n A furnace of the specified class, comprising acombustion chamber, a plurality of air passages extending verticallythrough the combustion chamber near each of its side Walls, a manifoldextending upward from the top of the combustion chamber, a radiator, apair of flues, angular in cross section, leading circuitously anddownward from the manifold to the radiator, and a houslng forming an 10air chamber enclosing the combustion chamber, then'ianifold, theradiator and the fines. Witness my signature at Omaha l ebraska,

January 7th, 1928.

I GUSTAV A. WIIG.

